code: def __init__(
      self,
      mailbox: Mailbox,
      settings: Optional[Settings] = None,
      log_level: Optional[int] = None,
      manager: Optional[_Manager] = None,
  ) -> None:
      self._done = False
      self.record_q = None
      self.result_q = None
      self.wandb_process = None
      self.interface = None
      self._internal_pid = None
      self._settings = settings
      self._log_level = log_level
      self._manager = manager
      self._mailbox = mailbox
  
      self._multiprocessing = multiprocessing  # type: ignore
      self._multiprocessing_setup()
  
      # for _module_main_* methods
      self._save_mod_path: Optional[str] = None
      self._save_mod_spec = None
  
imports: import importlib.machinery
  import logging
  import multiprocessing
  import os
  import queue
  import sys
  import threading
  from typing import TYPE_CHECKING, Any, Callable, Dict, Optional, Union, cast
  import wandb
  from wandb.sdk.interface.interface import InterfaceBase
  from wandb.sdk.interface.interface_queue import InterfaceQueue
  from wandb.sdk.internal.internal import wandb_internal
  from wandb.sdk.internal.settings_static import SettingsStatic
  from wandb.sdk.lib.mailbox import Mailbox
  from wandb.sdk.wandb_manager import _Manager
  from wandb.sdk.wandb_settings import Settings
label_desc: Use image node_id 1 to create a new Backend object  with example: obj = Backend(mailbox, settings, log_level, manager)